(CNN) - Health Secretary Kathleen Sebelius is again pushing back against calls for her resignation over the rocky rollout of the Obamacare website, saying “we are determined to make it perfect.”

While visiting a health insurance call center in Phoenix on Thursday, Sebelius stuck to the Obama administration’s line that the functionality of the online insurance marketplace Healthcare.gov is improving.FULL POST

(CNN) - House Oversight Committee Chairman Darrell Issa is raising the threat of a possible subpoena if Health Secretary Kathleen Sebelius doesn't respond to his panel's questions and requests for documents about problems with the Obamacare website. Committee aides say Sebelius has failed to respond to a previous request and he's now giving her until Monday to comply or possibly face "compulsory" action.

(CNN) - Navigating the political waters in her own family, says one ally, likely prepared Kathleen Sebelius well for the partisan cauldron she's now enduring in Washington over the rocky rollout of the Obamacare website.

The embattled Health and Human Services Secretary was the daughter of a Democratic governor of Ohio, then became the daughter-in-law of a Republican Congressman from Kansas. Her husband is a federal magistrate.

Washington (CNN) - Kathleen Sebelius did little to alleviate concerns about Obamacare even after she took to the airwaves on Tuesday in her first public explanation of the health insurance program's website woes.

Instead, in an exclusive interview with CNN's Dr. Sanjay Gupta on the multitude of problems the enrollment website has experienced, the Health and Human Services secretary stoked more opposition.

Washington (CNN) - Call it the Obamacare website fiasco, with the focus Wednesday on Health and Human Services Secretary Kathleen Sebelius after she told CNN that President Barack Obama knew nothing of the problem before it became evident starting on October 1.

Sebelius heads to the White House for an afternoon meeting with insurance industry executives, then leaves town to participate with other officials in what the administration calls a "grassroots effort" to boost enrollment in Obama's signature health care reform system.

Washington (CNN) - The Obama administration is going to kick off what it calls "a grassroots effort" to encourage more enrollment by the uninsured in the new health care exchanges, an administration official confirmed to CNN Wednesday.

"We are planning to deploy White House officials and Cabinet Secretaries to the 10 cities across the country with the highest rates of uninsured Americans to do enrollment events and other grassroots activities. These cities and metropolitan areas include Dallas; Houston; Miami; Atlanta; Phoenix/Tucson; North Jersey; Tampa; Orlando; Detroit and San Antonio," the official said.

Health and Human Services Secretary Kathleen Sebelius is among those who will be traveling. She will visit Phoenix, Arizona, and Austin and San Antonio, Texas, later this week, a second official told CNN.

Washington (CNN) - President Barack Obama didn't know about the problems with the Affordable Care Act's website - despite complaints from insurance companies and the site's crashing during a test run - until days into its now well-documented abysmal launch, the nation's health chief told CNN on Tuesday.

In an exclusive interview with CNN's Dr. Sanjay Gupta, Health and Human Services Secretary Kathleen Sebelius admitted Tuesday that there is significant concern in her department and the White House over the technical debacle surrounding the Obamacare website's rollout. The site was supposed to make it simple for people to search and sign-up for new health care policies starting on October 1, but instead it's been clunky and, at times, inoperable.

(CNN) - Rep. Paul Ryan on Tuesday joined a growing list of Republicans who want Health and Human Services Secretary Kathleen Sebelius to step down over rampant problems in the launch of Obamacare’s HealthCare.gov.

The 2012 GOP vice presidential nominee was on a conference call with reporters, helping fellow Republican and Virginia gubernatorial candidate Ken Cuccinelli make the case against a Medicaid expansion in the state championed by Cuccinelli’s opponent, Democrat Terry McAuliffe.FULL POST

Washington (CNN) - Republican gubernatorial nominee Ken Cuccinelli of Virginia joined a host of other Republicans calling for President Barack Obama to fire Health and Human Services Secretary Kathleen Sebelius for the rocky enrollment process for Obamacare.

"If President Obama is serious about cleaning up the mess he's created, he'll immediately fire Secretary Sebelius and call on Congress to pass legislation to delay the individual mandate," Cuccinelli said at a campaign event Monday, according to prepared remarks.FULL POST

Washington (CNN) - An official with the Health and Human Services Department said Friday that Secretary Kathleen Sebelius is not available to attend a congressional hearing next week on the Obamacare website glitches.

"Given that the government was shut down until today, we were given a very short timeline to respond to this request," the official added.FULL POST